Online cleaning system and method for circulating cooling water heat exchanger

Abstract

The invention discloses an online cleaning system and method for a circulating cooling water heat exchanger. The system comprises the heat exchanger, a centrifugal pump and a water storage tank. A feeding pipe and a water outlet pipe are arranged on one side of the heat exchanger, and a discharging pipe and a water inlet pipe are arranged on the other side of the heat exchanger. A water outlet of the water storage tank is connected with the water inlet pipe through a water outlet gate valve. A water inlet of the water storage tank is connected with the centrifugal pump through a water inlet gate valve. The centrifugal pump is connected with the water outlet pipe. The system further comprises an air compressor and a dirt discharge groove. An outlet of the air compressor is connected with the water inlet pipe through a gas outlet gate valve. An outlet of the dirt discharge groove is connected with the water inlet pipe through a drainage outlet gate valve. An inlet of the dirt discharge groove is connected with the centrifugal pump through a drainage inlet gate valve. A filter mechanism is arranged in the dirt discharge groove. The dirt discharge groove integrates the advantages of physical cleaning and chemical cleaning, achieves online cleaning of the heat exchanger, is good in cleaning effect and short in cleaning time, and improves cleaning efficiency.

Description

technical field [0001] The invention belongs to the technical field of heat exchanger cleaning, and in particular relates to an online cleaning system and method for a circulating cooling water heat exchanger. Background technique [0002] Heat exchanger is one of the widely used equipment in chemical industry and power field, its function is to transfer heat from hot fluid to cold fluid. Circulating cooling water heat exchanger is an indispensable equipment in the cooling system of modern industrial production lines. [0003] Heat exchanger fouling is a common phenomenon, and it is also a problem that needs to be solved urgently. In the design stage, due to the fact that the dirt resistance value is lower than the actual dirt, the heat exchange will be insufficient after a period of actual operation of the heat exchanger. If a new heat exchanger is added for parallel operation, the investment will increase. [0004] The fouling of the heat exchanger will increase the heat...

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Problems solved by technology

Nowadays, many physical and chemical online cleaning methods have the problems of complex devices and poor cleaning effects. For example, physical cleaning has a remarkable effect but generally cannot achieve online cleaning, and at the same time will cause certain losses to the metal surface, while chemical cleaning is easy to achieve online cleaning but cleaning The time is too long and the cleaning effect is average

Therefore, at present, the method of disassembling the heat exchanger for off-line cleaning is generally used, but this leads to regular shutdowns and production shutdowns, which increases unnecessary labor intensity and significantly increases maintenance costs and production shutdown losses. Moreover, the current cleaning is only for the inner wall of the tube bundle. Or the tube side of the heat exchanger, and the connecting part of the heat exchanger is not treated, which will affect the heat transfer effect of the heat exchanger

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